Presentation Information
[2E05]Micro-ARPES study of local electronic states in quantum materials
*Kosuke Nakayama1 (1. Graduate School of Science, Tohoku University)
In this study, we utilize micro-focused angle-resolved photoemission spectroscopy (micro-ARPES) to probe spatially inhomogeneous electronic states in quantum materials. We will provide key results, for instance on Tellurium (Te), whose helical chains are a theoretically proposed candidate for a one-dimensional (1D) topological insulator (TI). Investigating the Te(0001) surface, we discovered 1D states within the bulk band gap that are spatially confined to the crystal’s edges. This finding, corroborated by our density functional theory calculations, supports the formation of bound states originating from the 1D TI nature of the Te chains. We will also present our recent results on other quantum materials, further demonstrating the power of micro-ARPES in resolving complex, position-dependent electronic phenomena.